1 files changed, 49 insertions, 0 deletions
diff --git a/packages/create-astro/src/shell.ts b/packages/create-astro/src/shell.ts
new file mode 100644
index 000000000..d2d7ef033
--- /dev/null
+++ b/packages/create-astro/src/shell.ts
@@ -0,0 +1,49 @@
+// This is an extremely simplified version of [`execa`](https://github.com/sindresorhus/execa)
+// intended to keep our dependency size down
+import type { StdioOptions } from 'node:child_process';
+import type { Readable } from 'node:stream';
+
+import { spawn } from 'node:child_process';
+import { text as textFromStream } from 'node:stream/consumers';
+import { setTimeout as sleep } from 'node:timers/promises';
+
+export interface ExecaOptions {
+	cwd?: string | URL;
+	stdio?: StdioOptions;
+	timeout?: number;
+}
+export interface Output {
+	stdout: string;
+	stderr: string;
+	exitCode: number;
+}
+const text = (stream: NodeJS.ReadableStream | Readable | null) =>
+	stream ? textFromStream(stream).then((t) => t.trimEnd()) : '';
+
+export async function shell(
+	command: string,
+	flags: string[],
+	opts: ExecaOptions = {}
+): Promise<Output> {
+	const controller = opts.timeout ? new AbortController() : undefined;
+	const child = spawn(command, flags, {
+		cwd: opts.cwd,
+		shell: true,
+		stdio: opts.stdio,
+		signal: controller?.signal,
+	});
+	const stdout = await text(child.stdout);
+	const stderr = await text(child.stderr);
+	if (opts.timeout) {
+		sleep(opts.timeout).then(() => {
+			controller!.abort();
+			throw { stdout, stderr, exitCode: 1 };
+		});
+	}
+	await new Promise((resolve) => child.on('exit', resolve));
+	const { exitCode } = child;
+	if (exitCode !== 0) {
+		throw { stdout, stderr, exitCode };
+	}
+	return { stdout, stderr, exitCode };
+}